Pen



FIG. 1 is a front, top and right side perspective view of a pen showing our new design;

FIG. 2 is a right side elevational view thereof, the opposite side being a mirror image thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a front elevational view thereof;

FIG. 6 is a rear elevational view thereof;

FIG. 7 is a front, top and right side perspective view thereof with the cap removed;

FIG. 8 is a right side elevational view thereof with the cap removed, and

FIG. 9 is a top plan view thereof with the cap removed. 

The ornamental design for a pen, as shown and described. 